A block of mass 5 kg is resting on a frictionless surface. If a force of 15 N is
Practice Questions
Q1
A block of mass 5 kg is resting on a frictionless surface. If a force of 15 N is applied, what will be its velocity after 3 seconds? (2022)
3 m/s
5 m/s
9 m/s
15 m/s
Questions & Step-by-Step Solutions
A block of mass 5 kg is resting on a frictionless surface. If a force of 15 N is applied, what will be its velocity after 3 seconds? (2022)
Step 1: Identify the mass of the block, which is 5 kg.
Step 2: Identify the force applied to the block, which is 15 N.
Step 3: Use the formula for acceleration, which is a = F/m.
Step 4: Substitute the values into the formula: a = 15 N / 5 kg.
Step 5: Calculate the acceleration: a = 3 m/s².
Step 6: Identify the time duration for which the force is applied, which is 3 seconds.
Step 7: Use the formula for velocity, which is velocity = acceleration × time.
Step 8: Substitute the values into the formula: velocity = 3 m/s² × 3 s.
Step 9: Calculate the velocity: velocity = 9 m/s.
Newton's Second Law of Motion – This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
Kinematics – The study of motion, which includes calculating velocity, acceleration, and time.